The 1.2 kW DCS and XFR models I use are 1U rackmounts with outputs at the rear. none at the front. These are stacked with other rackmount PSUs below the bench off to one side, leaving the bench for the DUT and often an AWG, a scope, an analyzer and a few DMMs. For my work, there are usually various DC and AC voltages required at the DUT at any one time so this is actually a necessity.